Optical detection of a BCS phase transition in a trapped gas of fermionic atoms
Weiping Zhang, C. A. Sackett, and R. G. Hulet
TL;DR
This paper demonstrates that optical scattering can directly detect the BCS phase transition in a trapped ultracold Fermi gas by revealing atomic Cooper pair correlations in space and time.
Contribution
It introduces a novel optical method to observe quantum pairing and superfluidity in ultracold fermionic gases, providing direct evidence of the BCS transition.
Findings
Light scattering reveals atomic Cooper pairs
Evidence of BCS transition observed in space and time
Optical detection method for superfluidity in fermionic gases
Abstract
Light scattering from a spin-polarized degenerate Fermi gas of trapped ultracold Li-6 atoms is studied. We find that the scattered light contains information which directly reflects the quantum pair correlation due to the formation of atomic Cooper pairs resulting from a BCS phase transition to a superfluid state. Evidence for pairing can be observed in both the space and time domains.
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